380 "U-S. NATIONAL MUSEUM BULLETIN 236 



but without additional expansions. Abdominal somites 1 to 3 com- 

 pletely encircled distally by coarse spines. Segment 4 short, but in 

 this specimen considerably telescoped into 3rd. There are some 

 lateroventral spinules, but no distal teeth. Anal somite as long as 

 4th, half as long as wide, with big and heavy anal plate with smooth, 

 broadly rounded border. Insertion of furcal rami bordered with 

 spinules. 



Furcal rami tubular, 3 times as long as wide, external wall straight, 

 internal wall with slight swelling at % length from base; 2 fine setae 

 insert on swelling. 5 marginal setae and 1 appendicular seta on each 

 ramus ; setae 1,4,5, and appendicular seta fine, setae 2 and 3 lengthened 

 and thickened but both damaged in my specimen, with the result that 

 accurate structure cannot be given. In lateral aspect furcal rami 

 distinctly carinated in longitudinal direction; appendicular seta 

 found at end of carina. 



Antennules (fig. 149/) short, half length of cephalic somite, 4- 

 segmented: segment 1 with distinct outwardly directed spine; segment 



2 with 2 outwardly directed tubercles, each bearing fine seta; segment 



3 long, apparently resulting from fusion of several segments, with big 

 conical process, bearing aesthetasc and seta; ultimate segment short. 

 Setation represented in figure 149/. 



Allobasis of antenna with 2 internal swellings, each with spinules, 

 and small exopodite with 2 minute setae. Endopodite with 2 spines 

 and 5 marginal, spiniform setae, 3 of which are geniculate (fig. 149^). 



Mandibular praecoxa with small cutting edge, bearing 5 teeth and 

 small seta. Basipodite unsegmented, with 3 setae. Exopodite 

 absent, endopodite unsegmented, with 3 setae, short (fig. 149^). 



Dissection of maxillule, unfortunately, unsuccessful. 



Maxilla (fig. 149i) with 4 endites: 2 found on praecoxa, each bearing 

 3 setae; coxal endite much bigger, with 2 strong curved spines and 

 additional seta; basal endite as coxal endite, one of the spines of which 

 is larger. There are 2 basal setae which apparently represent the 

 endopodite. 



Maxillipede (fig. 149j) with short coxa and slightly swollen basis. 

 Endopodite imsegmented, forming curved, pointed digit, distally 

 corrugated. 



Leg 1 (fig. 149a) with 3-segmented exopodites and endopodites; basis 

 curiously developed by presence of huge socle for endopodite. Seta at 

 external border and spine on socle near insertion of endopodite. 

 Exopodal segments of equal length, 2nd without internal seta, 3rd 

 with 4 appendages, 2 of which are geniculate setae. 1st endopodal 

 segment 1% times as long as exopodite, 5 times as long as wide, with 

 seta at half internal margin. 3rd and 2nd endopodal segments 

 coalescent, forming very slender digit; distinct big seta near fusion of 

 both segments, reaching length of 3rd segment. 



